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새만금간척지에서 거대억새 투입 후 분해 특성 및 감자 재배를 위한 적정 질소시비수준 평가 KCI 등재

Using Eeclaimed Land for Potato Cultivation in Saemangeum, South Korea: Determining the Optimal Nitrogen Fertilization Rate with the Giant Miscanthus used as a Source of Soil Organic Matter

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  • URLhttps://db.koreascholar.com/Article/Detail/417964
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한국환경과학회지 (Journal of Environmental Science International)
한국환경과학회 (The Korean Environmental Sciences Society)
초록

To restore reclaimed land, it needs to be supplemented with organic matter; this is especially true for Korea, where organic matter constitutes only one-tenth of conventional agricultural soils. The giant Miscanthus, a perennial grass known for its extensive biomass, shows signs of being an excellent source of organic matter for restoring reclaimed land. Therefore, the objectives of this study were to (i) evaluate the feasibility of using the giant miscanthus as an organic resource within the context of re-using reclaimed land for agricultural purposes (i.e., potato cultivation), and (ii) determine the optimum fertilization rate for the potatoes while the giant miscanthus is being used as an organic resource. Our results show that after 180 days, giant miscanthus lost 23–47% of its original dry weight, with the extent of the loss dependent on soil salinity. Nutrient concentrations (Mg2+, Na+) continued to increase until the end of the study period. In contrast, potassium (K+) and the ratio of carbon to nitrogen (C/N) decreased until the end of the study period. Specifically, after 180 days, low salinity topsoil treatments had the lowest C/N ratio. In the first year, 150 % of standard N rates were required for the potatoes to achieve maximum productivity; however in the 2nd year, standard rates were sufficient to achieve maximum productivity. Overall, this implies that even though the application of giant miscanthus did eventually improve soil quality, increasing crop yields, N fertilization is still necessary for the best outcomes.

목차
Abstract
1. 서 론
2. 재료 및 방법
    2.1. 시험 장소 및 기상
    2.2. 새만금 간척지에서 거대억새 활용을 위한 분해 특성 평가
    2.3. 간척지 토양에 거대억새 투입 후 감자 재배 시 적정 질소시비량 평가
    2.4. 토양 이화학성 분석 및 작물 생육조사
    2.5. 통계 분석
3. 결과 및 고찰
    3.1. 간척지 거대억새 활용을 위한 분해 특성 평가
    3.2. 간척지 연차별 거대억새 투입 및 질소시비수준에따른 감자 생산성 비교
4. 결 론
감사의 글
REFERENCES
저자
  • 오양열(농촌진흥청 국립식량과학원) | Yang-Yeol-Oh (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea) Corresponding author
  • 정강호(농촌진흥청 국립식량과학원) | Kang-Ho-Jeong (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea)
  • 이수환(농촌진흥청 국립식량과학원) | Su-Hwan-Lee (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea)
  • 이광승(농촌진흥청 국립식량과학원) | Kwang-Seung-Lee (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea)
  • 서보성(농촌진흥청 국립식량과학원) | Bo-Seong-Seo (Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea)
  • 김길용(전남대학교 농화학과) | Kil-Yong Kim (Institute of Environmentally-Friendly Agriculture, Chonnam National University, Gwangju 61186, Korea)